hayes



R. W. E. HAYES.

PUMP REGULATOR 0H RELIEF VALVE.

Y APPLlc-Allon man Nov.2o.19u.

Patented Sept'. 2, 1919.

z SHEETSAHEETI R. W. E. HAYES.

PUMP REGULATOR 0R RELIEF VALVE.

APPLlcMIoN HLEU Nov.20. 1917.

1,314,746, Pawuwdsept. 2,1919.

2 SHEETS-SHEET 2.

UNITED sra'rns PATENT caricia.

l RALPH W. E. HAYES, OIF GALVA, ILLINOIS, ASSIG-NOR OF ONE-HALF TO HAYES PUMP & PLANTEB. COMPANY, F GALVA, ILLINOIS, A CORPORATION OF ILLINOIS.

PUMP-REGULATOR 0R RELIEF-VALVE.

Specification of Letters Patent.

Patented Sept. 2, 1919.

To all whom it may concern:

Be it known that I, RALPH W. E. HAYES, a` citizen of the United States, residing at Galva, in the county of 'Henry and State of Illinois, have invented certain new and useful 4Improvements in Pump-Regulators or Relief-Valves, of which the following is a specification. f,

The present invention relates to an attachment used in conjunction with force pumps and is particularly applicable to power spraying machines used for the purpose of spraying fruit trees, etc.

One object of the invention is to arrange the parts of a device of the character specified so that they can be readily taken apart for the purpose of repairs, cleansing, etc., without breaking the pipe connection to the tank or to the pump. y

A further object of the invention is to provide a form of casing which will be capable of ready and quick conversion to enable it to be used either as a relief valve or as an automatic pump governor.

A further object of the invention is to arrange means which will enable an instantaneous relief-to .be 'effected' without waiting for the usual inflation of the diaphragm against a spring pressure to bring about such result.

The invention further consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings:

Figure 1 is a vertical section through the entire appliance;

Fig. 2, a. section on line 2.-2 of Fig. 1, looking in the direction of the arrows;

Fig. 3, a section on line 3 3 of Fig. 1, looking in the direction of the arrows;

Fig. 4, an under face view of the rotative member for effecting the quick release;

Fig. 5, a perspective detail of the member placed Aupon the top of the diaphragm and which receives the diaphragm rod; and

Fig. 6 is a detail sectional view of the valve used in the diaphragm chamber.

i In the art to which the present invention relates, devices are now known whereby if 50 a luid pressure within a hose or .conduit gets beyond a predetermined degree, auto matic mechanisms are set in motion which effect a circuit of the fluid so that it is re-v discharged back into the tank, thus reliev- ,L55 ing the pump of 'the load that would otherwise be produced by forcing the liquid against an abnormal pressure, which pressure might, unless relieved, cause the hose or other conduit to burst.

These devices sometimes take the form of what is commonly termed a pressure relief valve or the form of what is termed an automatic pump governor.

The present invention deals with a form of device which can be quickly adapted to serve as either one of the above types of mechanism, and also contains various improvements which will be apparent from the following specification.

Referring now to the drawings, the device as shown comprises what may be termed a base portion (i and a top portion 7. The base portion is formed with a vertical neck 8 and a horizontal neck 9, each of which is interiorly threaded. In the form of construction shown in Fig. 1, the device. is arranged to be used as a relief valve, and in such constructions the conduit leading to the pump is connected to the neck 8; and interposed in this conduit is the connection to the line of hose, on the outer end of which is the usual spray nozzle. In ordinary operation, the liquid is forced through the hose and out through the nozzle, but in spraying operations from time to time the passage of liquid through the nozzle is cut off and the spraying operations stopped. When this takes place, the fluid, not being able to pass out from the hose, backs up and enters through the passage in the neck 8 into the chamber 10 within the base and through passage 11, and thence through the passage 12 in a leg 13, forming a portion of the top 7.

When the pressure of the liquid within the chamber' 10 reaches a `.predetermined degrec, it will force upward a diaphragm 14 communicating with said chamber. Resting on top of this diaphragm is a plate 15 carry- A ing, as shown in the drawings, companion lugs 16 spaced apart to provide a cavity 17, within which rests the lower end 18 of a stem or rod 19, and in the construction shown this lower end is flattened to a rectangular shape. This rod extends upward through a suitable stufling box 20 and its upper end rests adjacent a ball check valve 21seated upon a 4flanged ring 22. y

When the diaphragm is moved upward by pressure of the liquid, it elevates the rod 19,

lifts the ball 21 from its seat, opening a passage for the liquid, so that it flows down through the opening 23 into the conduit 24 formed in a leg 25 1n the top portion 7, and

thence downward through the con-duit 26 formed in the base, and out through the passage in the neck 9 and into a conduit (not phragm is extended, as will be seen :from` Fig. 1, to form a packing at the point of connection of the basev and top portiomand suitable openings 28 are cut in the diaphragm` to allow the passage of the liquid through the various conduits in the base and' top portion. It will be observed that the pipe lconnections are all made'to the'base section. By removing the bolts 27 ,the base and top sections can be se arated easily and quickly for the purpose ov cleansing, repairs, etc., and at the same time the connections between the base and pump and tank conduits remain unbroken.

important point since it isfhighly desirable that `no leakage occurs at the point of connection of these conduits, and by making the appliance in the manner described, tight fitting joints can be employed at such points of connection without creating difficulties in the way of disconnecting orl disassembling the appliance.

In the ordinary operation of the relief valve, the upper 'check valve 21 will be lifted by the movements of the rod 19 produced by the actuation of the diaphragm 14. This diaphragm works against the tension of a strong coilK spring 29 and it is frequently necessary to get a. quick relief before suiicient fluid pressure has been created to force the diaphragm and rod- 19 upward against the pressure of this strong spring 29. T0 accomplish this, l provide a means for obtaining a quick relief, whereby the rod 19 may be operated to lift the check valve 21 without the presence of sufficient fluid' pressure to actuate the diaphragm.

To carry out the above, I aiiix a washer 30 adjacent to the lower end of the rod 19.

Surrounding this rod and resting against the washer is a coil spring 31. Threaded on to the rod, as at 32, is a nut 32, and located below this nut, but having a turning fit. 0n the rod 19, is a hand grip 33 (see Figs. 2 and 4) formed with a cam surface 34 on its under face. A bridge or cross wall 35 is formed between the legs 25 and 13, and on top of thiscro-ss Wallis a ring-like surface 36 formed witha cam or wedge-shaped sur- This is a very .f l i v The light spring 31 is only provided to insure the quick return of the rod 19. Itv would fall `by gravity, but the movement` through lpassages 11, 12,

face 37, which surface 37 is alined with the cam surface 34 on the under face of the hand grip 33. When this member 33 is turned by the operator, the engagement of .justable is so that the throw of the rod 19 can be regulated somewhat in case the end of ment occur, and the reason for flattening the lower end of the rod 19 and mounting it between the lugs 16 is to prevent the rod from turning 'when adjustment is made of its nut 32a. The upward movement'of the rod 19 unseats the check valve 21, allowing the liquid topass through'the conduits 24 and 26 back to the tank. Such movement of the rod19 is against the pressure of the light v spring 31 only, since, owing to the fact that there is no positive engagement between the end 18 of said rod and plate'15, the rod can move yback Iand. forth without moving the 'diaphragm 14, and can move without being vsu=bl]ected to the retarding pressure of the` heavyispring 29. Hence this emergency vor quick relief-can be' brought about veryeasily and quickly.

might be rather sluggish, owing to the friction exerted by the packing 20. v

When thedevice is used as an automatic pump governor, Va connection is made be ,tween an air chamber (not shown) and a neck 38 (see Figs. 2 and 3), which is arranged at right angles to the neck 9; the hose connection to the spray rod is disconnected from the conduit leading from the pump to the neck 8 and connection is made between the ,air chamber and spray rod; a valve seat 41 is inserted in the chamber 10, as indicated in Fi 6; and a check valve 40 seats vthereupon also shown in Fig. 6).v When1 the device is thus used, the liquid enters through the passage in the neck 8 from the ump, raises the check valve 40, liows out tlirough the opening in the neck 38 into the air chamber, and thence to the hose leading to the spray rod.

When the nozzle is operated to cut olf the passage of liquid therethrough, a back pres'- sure is created in the air chamber which is back to e supply tank.l l y Thus, by a simple change, the device can be readily adaptedv for use either as a pump 23, 2A.- and 26 and' governor or a relief valve. The operation is believed to be obvious from the foregoing description and therefore will not be taken up in detail.

By referring to Figs. 2 and 3, it will be understood that the passage through the neck 38 is closed by a removable plug 38 when the device is used as a relief valve, and in such use connection to the air chamber is not made.

I claim:

1. In a device of the class described, the combination of a base portion arranged to receive a pump conduit and a tank conduit, said base portion having a chamber with which the pump conduit connects, a top portion, a circuitous passage through said top connection between the base portion andv portion communicating at one end with the pump conduit and at the other end with the tank conduit, a valve arranged in the top portion and controlling communication through said passage, means influenced by conduit for actuating` said valve and wing liquid to pass through said passage and back to the tank, and separable means for connecting said top and base portions to allow said top portion to be removed and the passa' e and valve therein cleanedsaid separa le means being located above the point of pump and tank conduits, whereby the top portion may be disc,onnected from the base portion without disturbing the connections of the pump and tank conduits to the base portion, substantially as described.

2. In a device ofthe class described, the combination of a base portion arranged to receive a pump conduit and a tank conduit, said base portion having a chamber with vwhich the pump conduit commuicates, a

top portion, a circuitous passage through said top portion communicating at one end 'with the pump conduit and at the other end with the tank conduit, a valve arranged in the top portion controlling communication through .said passage, the adjoining faces between the base and top portion being of fiat formation, a diaphragm interposed between said faces and extending across said chamber and exposed to the action of the liquid coming through the pump conduit, means actua-ted b sald diaphragm'for operatin said control ing valve, releasable means for ringing the adJoining faces of said top and base portion into hard engagement with the diaphragm, said diaphragm being 1ocated above the point of connection between the base portion and pump and tank conduits, whereby the base and top portions may be disconnected without disconnecting the pump and tank conduits, and said diaphragm being formed with openings Vin alinement with the circuitous passage and forming a packing around said assage to prevent leakage at the juncture of) said passage and conduits, substantially as described.

3. In a device of the class described, the combination of a body portion having a fluid passage therein, means for establishing communication between one end of the passage and a pump conduit and between the other end of the passage and a tank conduit, a diaphragm subjected to the pressure of liquid from the pump conduit, a spring against the resistance of which the diaphragm moves, a plate resting on the diaphragm, lugs extending from .said plate and ,I

spaced apart from one another, a rod resting against said plate, whereby the rod may be moved longitudinally independent of the diaphragm, valvular controlling means for said passage actuated by said rod, and means for causing said rod to move and unseat said valve independent of the movement of the diaphragm and K free of the resistance of said spring to obtain a quick relief, substantially as described.

4. In a device of the class described, the combination of a body portion having a fluid passage therein, means for establishing communication between one end of the passage and a pump conduit and between the other end of the passa e and a tank conduit, valvular means or controlling communication through said passage, a ro for opening said valve, means influenced by an excess pump` pressure for actuating said rod, a hand-operated member secured to said rod and having a cam surface on its under face, a corresponding cam face fixedly secured to the body portion of the device, and said cam surfaces coperating when the hand-operated member is turned to lift said member and move the rod longitudinally independent ofthe means actuated by the fluid pressure whereby a quick relief 1s obtained, substantially as described.

RALPH W. E. HAYES. 

